DocumentCode :
3569418
Title :
Adaptive IIR Notch Filters for tracking of quasi-harmonic signals
Author :
Szczupak, Alexandre Leizor ; Biscainho, Luiz Wagner Pereira
Author_Institution :
LPS, Univ. Fed. do Rio de Janeiro, Rio de Janeiro, Brazil
fYear :
2012
Firstpage :
2119
Lastpage :
2123
Abstract :
In this paper, a new procedure for the design of a cascade of IIR Adaptive Notch Filters (ANFs) is presented. The cascade is composed by second-order sections of modified Nehorai Constrained ANFs, with coefficients modeled by a single polynomial of arbitrary order. This approach allows for a design with less parameters to control notch positions than the number of cascaded sections. The resulting structure is particularly suitable for tracking components of quasi-harmonic signals. An example shows that the coefficient modeling can tackle the inherent inharmonicity of the notes emitted by a string instrument. Finally, a complete adaptation algorithm for the model parameters, derived from Nehorai´s ANF recursive prediction error algorithm, is described.
Keywords :
IIR filters; adaptive filters; notch filters; polynomials; position control; prediction theory; signal processing; tracking; Nehorai ANF recursive prediction error algorithm; adaptive IIR notch filters; arbitrary order polynomial; coefficient modeling; complete adaptation algorithm; model parameters; modified Nehorai constrained ANF; notch positions control; quasiharmonic signals tracking; second-order sections; string instrument; Adaptation models; Chirp; Instruments; Mathematical model; Polynomials; Q factor; IIR; adaptive notch filter; inharmonicity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Conference (EUSIPCO), 2012 Proceedings of the 20th European
ISSN :
2219-5491
Print_ISBN :
978-1-4673-1068-0
Type :
conf
Filename :
6334279
Link To Document :
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